Emergency Sirens

AttackThis is a tone that rises for 6 seconds and falls for 6 seconds, over a three minute timeframe. When this tone is sounded, it means that there is an attack and you should immediately tune to radio or television broadcasts for information.

EvacuationThis is a tone that rises for 16 seconds and falls for 8 seconds, over a half minute timeframe. When this tone is sounded, it means that there is a threatening condition present, such as a chemical spill or leak, and you should immediately evacuate the area.

Weather Alert This is a continuous steady tone that will last for 3-5 minutes when deployed. When this tone is sounded, it means that life threatening weather in the form of a tornado has been detected by the National Weather Service on Doppler radar, or a sighting of a tornado or funnel cloud has been made by a trained weather spotter.